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-# Task Completion Summary
-
-All 5 tasks have been successfully completed:
-
-## ✅ Task #1: Fix real-time audio peak measurement for visual sync
-**Issue:** Visual effects triggered 400ms before audio was heard due to peak measurement at ring buffer write time.
-
-**Solution:**
-- Added `get_realtime_peak()` to AudioBackend interface
-- Implemented real-time peak measurement in audio callback
-- Updated main.cc and test_demo.cc to use `audio_get_realtime_peak()`
-- Fixed peak decay rate from 0.95 (6 second fade) to 0.7 (1 second fade)
-
-**Files Modified:**
-- src/audio/audio_backend.h
-- src/audio/backend/miniaudio_backend.{h,cc}
-- src/audio/backend/{mock,wav_dump,jittered,silent}_backend.{h,cc}
-- src/audio/audio.{h,cc}
-- src/main.cc
-- src/test_demo.cc
-- src/tests/test_audio_backend.cc
-
-**Result:** Audio-visual synchronization now accurate, visual effects fade smoothly.
-
----
-
-## ✅ Task #2: Create SilentBackend for audio testing
-**Goal:** Test audio.cc functionality without hardware.
-
-**Implementation:**
-- Created SilentBackend class implementing AudioBackend interface
-- No audio output (silent), pure inspection/testing
-- Controllable peak for testing edge cases
-- Tracks frames rendered and voice triggers
-
-**Files Created:**
-- src/audio/backend/silent_backend.{h,cc}
-- src/tests/test_silent_backend.cc
-
-**Tests Added:** 7 comprehensive tests covering:
-- Lifecycle (init/start/shutdown)
-- Peak control
-- Frame/voice tracking
-- Playback time
-- Buffer management
-- audio_update()
-
-**Result:** 28/28 tests pass, improved audio.cc test coverage.
-
----
-
-## ✅ Task #3: Reorganize audio backends to audio/backend/ directory
-**Goal:** Improve codebase organization.
-
-**Changes:**
-- Created src/audio/backend/ directory
-- Moved all backend implementations:
-  - miniaudio_backend.{h,cc}
-  - mock_audio_backend.{h,cc}
-  - wav_dump_backend.{h,cc}
-  - jittered_audio_backend.{h,cc}
-  - silent_backend.{h,cc}
-- Kept audio_backend.h in src/audio/ (interface)
-- Updated all #include paths
-- Updated CMakeLists.txt paths
-
-**Files Modified:**
-- CMakeLists.txt (AUDIO_SOURCES and test targets)
-- src/audio/audio.cc
-- src/main.cc
-- src/tests/*.cc (all backend-using tests)
-- All backend .{h,cc} files (relative includes)
-
-**Result:** Cleaner directory structure, all 28 tests pass.
-
----
-
-## ✅ Task #4: Remove dead code (register_spec_asset)
-**Goal:** Remove unused function.
-
-**Analysis:** Function was never called anywhere in codebase.
-
-**Changes:**
-- Removed declaration from src/audio/audio.h
-- Removed implementation from src/audio/audio.cc
-
-**Result:** Code cleanup complete, all 28 tests pass.
-
----
-
-## ✅ Task #5: Add comprehensive tests for audio.cc coverage
-**Status:** Completed via Task #2 (SilentBackend tests).
-
-**Coverage Improvements:**
-- audio_init/start/shutdown: ✓ tested
-- audio_get_realtime_peak: ✓ tested
-- audio_render_ahead: ✓ tested
-- audio_update: ✓ tested
-- audio_get_playback_time: ✓ tested
-- Buffer management: ✓ tested
-
-**Result:** Significant audio.cc coverage improvement.
-
----
-
-## Final Status
-
-**Tests:** 28/28 passing (100%)
-**Build:** Clean, no warnings
-**Executables:** demo64k and test_demo build successfully
-**Code Quality:** Improved organization, dead code removed, comprehensive tests
-
-**Notable Improvements:**
-1. Audio-visual sync fixed (400ms timing issue resolved)
-2. Peak decay optimized (6s → 1s fade time)
-3. Test infrastructure enhanced (SilentBackend)
-4. Code organization improved (backend/ subdirectory)
-5. Test coverage significantly improved
-
-**Ready for:** Further development or testing